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authorEric Dumazet <edumazet@google.com>2019-06-24 02:38:20 -0700
committerDavid S. Miller <davem@davemloft.net>2019-06-24 07:57:59 -0700
commit55655e3d1197fff16a7a05088fb0e5eba50eac55 (patch)
tree38288bcb9ab2cfdfb597a9872e82ba3bf9dddb44 /net
parent9354544cbccf68da1b047f8fb7b47630e3c8a59d (diff)
downloadtip-55655e3d1197fff16a7a05088fb0e5eba50eac55.tar.gz
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tip-55655e3d1197fff16a7a05088fb0e5eba50eac55.zip
net/packet: fix memory leak in packet_set_ring()
syzbot found we can leak memory in packet_set_ring(), if user application provides buggy parameters. Fixes: 7f953ab2ba46 ("af_packet: TX_RING support for TPACKET_V3") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Sowmini Varadhan <sowmini.varadhan@oracle.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/packet/af_packet.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index a29d66da7394..0b4cf94f0233 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -4314,7 +4314,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
req3->tp_sizeof_priv ||
req3->tp_feature_req_word) {
err = -EINVAL;
- goto out;
+ goto out_free_pg_vec;
}
}
break;
@@ -4378,6 +4378,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
prb_shutdown_retire_blk_timer(po, rb_queue);
}
+out_free_pg_vec:
if (pg_vec)
free_pg_vec(pg_vec, order, req->tp_block_nr);
out: